The effect of Foliar Spraying of Iron Nanoparticles with Chitosan Coating on Morphological and Physiological Characteristics of Lemon balm under LED Light

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Document Type : Research Paper

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Department of Horticultural Science Faculty of Agriculture and Natural Resources, University, of Mohaghegh Ardabili

Abstract

Improving the growth and increasing the amount of secondary metabolites in the lemon balm using nanoparticle technology combined with monochromatic LED lights is one of the main objectives of this study.This research was carried out in the growth chamber and greenhouse of the Faculty of Agriculture of Mohaghegh Ardabili University in order to evaluate the effect of foliar spraying of iron/chitosan nanoparticles under LED lights on the growth and physiological characteristics of the lemon balm in a factorial design based on completely randomized design with four replicate in the form of pot culture. The first factor includes foliar spraying with iron nanoparticles coated with chitosan in 3 concentrations of zero, 10 and 20 mg/L and the second factor includes light treatments including white, red, blue and greenhouse conditions.The results showed that the foliar spraying of lemon balm plants with 10 mg/L of iron/chitosan nanoparticles showed the greatest increase in yield, leaf area, stomatal conductance and photosynthetic pigments, compared to other applied concentrations and control plants. Also, iron/chitosan nanoparticles at a concentration of 20 mg/L showed the greatest effect on the development of the root system. The use of LED lamps often caused restrictions in the growth of the aerial parts of the lemon balm plant. The highest increase in the amount of photosynthetic pigments was observed in white light combined with nano iron/chitosan at a concentration of 10 mg/L. foliar spraying of lemon balm plants with 20 mg/L under blue light had the greatest effect in increasing the secondary compounds.

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION

Articles in Press, Accepted Manuscript
Available Online from 20 January 2026

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